Hi Jackz,
Welcome to TOTV! I think you are wise to stick to your time frame and not feel rushed to buy a lot and then have to build before you are ready/able.
TV is still growing; and it sounds like you did an excellent job of letting your agent know what to find for you. In the meantime, you have time to consider any other "wants" you might discover for your home site, such as ability to add a cart garage, as Russ said, or a birdcage, or the direction your lanai faces. For example, some people don't want west facing/ afternoon sun. Others prefer it or don't consider it that important. You also have time to think about any home upgrades you might want.
I checked the
Aster floor plan. It does look very nice.
Congratulations on your decision to move to Lower Paradise. All best wishes!